Questions tagged [power]

Power is the rate at which energy is supplied or consumed, often measured in Watts. This tag covers electrical power specifically, the voltage and current specifications for supplying power to the Pi, the specifics of power consumption by the Pi, and methods for controlling Pi power consumption.

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How to shut down the RPI4 for a certain time or prevent it to turn on power on booting

For my project, I access the RPI remotely. The RPI continuously powers sensors over its 3.3vdc rail. For testing & troubleshooting, I would like to cut current to those sensors for some time. ...
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Pi 4, Hifiberry, and touchscreen power

I recently finished my basement and am in the process of getting it all configured, and one thing I wanted was to build a Raspberry Pi streaming device. I got a 3D printer for Christmas and found this ...
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Calculating power adapter needs for my Compute Module 4 setup

So I'm finding it a little difficult to figure out how I should be powering my setup. I'll have Waveshares IO board here: https://www.amazon.com/gp/product/B08VJBGD1Q/ref=...
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Constant 3V3 to GPIO output behavior

I am new to circuit design, and I have some questions about a circuit I'm seeing in a raspberry pi starter kit. I think my questions is elementary, but I am having trouble finding an answer due to my ...
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2answers
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Can I turn On and Off my Raspberry Pi 3B+ on a specific time?

I have my Raspberry Pi 3B+ powered via Solar Panel. And I know that Raspberry Pi especially 3B+ have low power consumption unlike any other Raspberry Pi version. Though Power Consumption was not that ...
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28 views

Raspberry Pi 4B power consumption headless with constant usage

I'm setting up my Raspberry Pi 4b 2GB RAM in headless mode with a 64-bit Raspberry Pi OS Lite. It won't have anything plugged into it, but for an ethernet cable. It'll be performing FAH tasks (...
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SD card isn't being detected by raspberrypi 3 B+ or my laptop

Raspberrypi 3 B+ was working yesterday, had the raspbian image flashed onto it and I was able to ssh into it headless from my laptop with no major issues. However, today it didn't boot up, so I ...
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33 views

Most energy efficient way to perform periodic tasks on RPI ZERO W

I would like to make my Rpi Zero W execute a simple task (which takes an insignificant fraction of time to perform, <1s) using inputs from sensors exactly f times a day. I am wondering whether: ...
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1answer
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How to turn on a remote battery-operated Raspberry Pi (accessible by Wifi or SSH)?

I am running a cluster of Pi3 and Pi4. Each node runs on a battery and is powered by a solar panel, in a remote area like a farm with no grid. Pis are connected to each other by WiFi in a local ...
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Turn off external harddrive bay

I have an IcyBox external hard drive bay with a fan, which is quite noisy. Seems like you cannot completely turn off the fan, even when the harddrives are all suspended. However, when I shutdown the ...
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1answer
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Delay booting devices or booting the kernel

BLUF: I'd like to see if there's a solid way to delay the boot-up of the kernel to keep a Pi from sucking up a lot of juice out of the gate, or the USB bus to delay the devices' boot-up until after ...
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Powering a Pi 4 with a small power bank [duplicate]

For my project SamplerBox, I had done many extensive tests in the past and it was possible to successfully power a RPi 2 for multiple hours with such a small 2600mAh power bank (18650-battery inside), ...
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49 views

how to detect human presence at the computer

After working from home for a while, I bought a standing desk that can move up and down. I'd like to have better understanding of my work patterns, especially these 2 metrics: how much time do I ...
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Raspberry Camera turns off everytime I pull the plug to restart

I'm using ivport-v2 and followed the guide to get my camera running. Went in sudo raspi-config enabled I2C and Camera, then reboot and everything works fine. However, when I pull the plug on my RPi it ...
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Is there any advantage powering up a RPi 4B with a PSU rated for 8A @ 5V?

I have a Raspberry Pi 4B 4GB RAM variant that will be running 24/7 with the following attachments: an ethernet cable leading to a router for internet connectivity a 2.5" external HDD attached ...
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4answers
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Low voltage warning powering Raspberry by means of power bank

I'm trying to power my Raspberry 3 model B by means a Catlyn Power Bank 10000mah just purchased and seems to work fine with an iPhone 11. The problem is that when I connect it to Raspberry, even if ...
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Power Monitoring Physics Experiment

Hi i am just planning a Physics experiment where i accelerate Ionized Gases onto a target sample. For this Experiment i need to monitor the power constantly over a week or longer. For my later data ...
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Is It Safe To Connect A 16 Port Servo Driver's External Power Supply To My Raspberry Pi? (Will It Cause A Brownout?)

I have an adafruit 16 port servo driver. In the directions on their webpage, they explain how to wire it, as well as connect an external power supply. They mention not to plug the power directly into ...
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Does the power port of the Raspberry Pi 3a+ have lines for transfering data?

Im getting a Pimoroni Power On Off Shim for my Pi 3a+ and wonder if i could use the original power micro USB-port for data stuff, like connecting a 3D printer or a webcam - since the 3a+ lacks ...
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108 views

Is it possible to connect multiple WS2812 LED Strips to a Raspberry Pi 3?

im new to the Raspberry Pi in general and followed this tutorial https://dordnung.de/raspberrypi-ledstrip/ws2812 to control a single LED Strip. I was wondering if it was possible two control a second ...
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Bespoke Power Supply cable issue

I am trying to create an in-car (headrest) entertainment system using the Pi 3B with 7" screen using OSMC, when OSMC is shutdown it does not fully power off the screen, I can detect the shutdown ...
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Can't wakeup Raspberry Pi if unused for more than a day

I'm using Raspberry Pi to run Onion Share and ProtonVPN on a CanaKit Raspberry Pi 4. I check it once a day. Moving the mouse wakes it up. But if I miss a day, moving the mouse does not wake it up. ...
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315 views

Raspberry Pi Pico 5V output using VBUS?

there! I'm planning to use the Raspberry Pi Pico for a project and I'll be using a SCA60c tilt sensor with it. I know that the Pico only has a 3.3V output but the SCA60C needs 5V to power it. I was ...
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Is there a risk for the rpi to be under powered?

I power my RPi 3 from a Meross strip and I often get the small yellow lightning bolt in a corner that indicates that the RPi is underpowered. I know that this can lead to all sorts of issues with the ...
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2answers
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Arduino nano connected to raspberry pi with external power causes display blackout

I am trying to prototype a circuit involving an Arduino nano, using a raspberry pi (on which I am typing this question). I have connected the nano to a 9V DC power supply via its Vin pin, with GND ...
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Best way to power Pi CM4 and Harddrives

I'm trying to create a NAS that I can just power off a single 12v power supply. I'm using the RPi CM4 because I have the PCIE Gen 2 that I can run a SATA controller off of. Option A) My initial ...
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2answers
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How can I short GPIO3 when external 5v power is switched off?

Background: I have my RPi running connected to a small UPS. This works fine when the power goes out for a short time, but I want to have the Pi power down when the power is off and it's running from ...
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2answers
61 views

Pi 5V Pin Max Current Before Melting Happens?

I have a hypothetical project in mind I would like to pursue but wanted to ask this before sinking too much time into it. That being having multiple SPI slaves connected to a Pi Zero. From what I've ...
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3answers
177 views

power the logic circuit of an external component with an external power supply instead of the raspberry pi's GPIO

I want to know if is it possible to power the logic circuit of an external component used with raspberry pi not in the way shown below (using the 3.3v or 5v ang GRND GPIO), but with an external 3.3v ...
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2answers
248 views

Could a raspberry pi pico power a PC fan

I have recently soldered a 90mm PC fan to a USB cable and it works great. I was wondering if it would be possible to power said fan off of the 5v output pin on the pico, and solder the black wire to ...
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Powering aAdafruit PiTFT 2.4" HAT Mini Kit - 320x240 TFT Touchscreen. via a power bank. (Needs a bit more power)

I've been having problems getting this set up and now I do believe I know why. I got an Anker Power Bank (26,800mah) Not the Power Core + Input: 5V ⎓ 4A (5V ⎓ 2A Max Per Port) Output: 5V ⎓ 6A (5V ⎓ 3A ...
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5answers
207 views

How to daisy chain the power across two Pi's

Similar to Can I power a Pi through a 5V pin?, but I want to acquire the 5V power source from another Pi. The first Pi gets its power via micro USB, and then I want to use pins 2 and 6 from that to ...
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1answer
40 views

Powering automated watering project

I am making my mother an automated watering system for her garden with my Raspberry Pi. I would like the system to be able to detect soil moisture, as well as predict temperature and humidity to ...
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0answers
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Is it safe to change the power settings to allow raspberry 400 to power using usb?

I recently got a raspberry pi 400 and wanted to use it as a portable device but realised that it can only get full power when plugged into a power socket. I saw a video showing that you can use it ...
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2answers
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What is the maximum power a Rpi4 can be fed?

I was using a raspberry power supply to power the pi in a setup for 3d printing, a camera and 5" lcd touchscreen run off the pi. I kept getting low voltage warnings so I purchased a 5v 5a power ...
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32 views

Turning switch on lowers voltage from 5.2v to 3.0v

This is probably a simple question, but I’ve researched a lot and haven’t been able to figure out how to fix the problem. Basically, I have a Raspberry Pi and a 5-inch LCD screen wired to a toggle ...
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2answers
860 views

How to boot and safely shutdown with a button when WAKE_ON_GPIO=0

1. Description To boot and shutdown my pi I have been using a button shorting GPIO 3 an GND. However after shutting down the pi, the fan shim and HDD keep on running. To solve this I've edited the ...
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1answer
438 views

How to recover Raspbian/Raspberry Pi OS boot media after power failure

There are many questions similar to mine and none with a coherent applicable answer. Setup Raspberry Pi OS Buster; up to date. Raspberry Pi 4B. Red LED has a steady glow: current is stable. Both ADATA ...
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2answers
1k views

Reduce power consumption Raspberry PI 4

I plan to use a Raspberry PI 4b powered by battery and hopefully to monitor a remote chicken farm and need it to last a week or two on a car battery. If powerconsumption is 1A then with a 60 AH ...
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1answer
73 views

Raspberry pi voltage between PP3 - PP27 is 0.01V is this normal?

I measured voltage using a multimeter between PP3-PP27 and it was fluctuating between 0.01V to 0.06V is this normal? The entire problem can be found here: USB ports recieving power but not working on ...
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1answer
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What would be a good indication to see when it turned off?

my issue is around knowing when the raspberry pi is turned off so I can disconnect it from the power supply. H.W - Rev 1 B+ Details on LEDs: PWR LED - ALWAYS ON if POWER SUPPLY IS CONNECTED ACT(...
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1answer
57 views

Can i power my Raspberry pi 3 b+ with a micro-USB to USB thats connected to a USB charger?

I read in the manual, that u should charge it with 5V and 2.5 amp, but im not sure. I already read, that a undervoltage can damage the pi and that USB 3.x would be enough, but I still dont know how ...
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307 views

USB ports recieving power but not working on Raspberry Pi 3B

I use external harddisk(connected via USB with its own power supply) to boot into dietpi on my raspberry pi. It works okay for a day(even with multiple reboots and poweroff). But the next day RPi ...
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How to power PCA9685

I am using the RP 4B and am trying to control a servo with the PCA9685. Unfortunatelly I am very new to all that and therefore I don't know which specific components I need to power it up. I bought a ...
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153 views

Can USB ports blow polyfuse on Raspberry Pi 3B?

I suspect my RPi 3b polyfuse to be blown, but I don't know what's causing it. I'm using an external HDD for booting into DietPi with its own power supply and after every day or so all the USB ports ...
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2answers
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Does Raspberry Pi 3B have polyfuse? Can USB ports blow polyfuse? [duplicate]

Does Raspberry Pi 3b have polyfuse? If it does, under what conditions can it be 'blown'? I suspect my RPi 3b polyfuse to be blown, but I don't know what's causing it. I'm using an external HDD for ...
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0answers
169 views

No power to usb ports on raspberry pi 3B

I use external harddisk(connected via USB with its own power supply) to boot into dietpi on my raspberry pi. It works okay for a day(even with multiple reboots and poweroff). But the next day RPi ...
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3answers
55 views

Performance of the Rasperris

The Raspberry pi 4 has a power supply that can deliver a maximum of 15.5 watts. How much power exactly does the Raspberry use without overclocking at maximum power so that I can connect the ...
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1answer
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Is there any way to connect external graphics cards to the Rasperri?

I would like to connect graphics cards to my Rasperri, for example an rx 580. I can also buy an external power supply unit to supply it with power. So is it somehow possible that the Rasperi works ...
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4answers
152 views

Temperature, Humidity and Weight monitoring for beehives using Raspberry Pi Zero [closed]

I'm new about Raspberry world.. I'm studying a way to implement a custom beehive monitoring system. I would like to make a premise: I'm studying to organize the project, I'm not yet implementing or ...

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